Examine source code of Scrolller Saver

{
  "manifest_version": 2,
  "name": "Scrolller Saver",
  "version": "0.2",
  "description": "Позволяет сохранять картинки со scrolller.com",
  "icons": {
    "48": "favicon-16x16.png"
  },
  "applications": {
    "gecko": {
      "id": "zerg85@list.ru",
      "strict_min_version": "45.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://scrolller.com/*"
      ],
      "js": [
        "ScrollerSaver.js"
      ]
    }
  ]
}